Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Quantum computing moves forward

A sil­i­con chip lev­i­tates indi­vid­ual atoms used in quan­tum infor­ma­tion pro­cess­ing. Photo: Curt Suplee and Emily Edwards, Joint Quan­tum Insti­tute and Uni­ver­sity of Mary­land. Credit: Science.
A sil­i­con chip lev­i­tates indi­vid­ual atoms used in quan­tum infor­ma­tion pro­cess­ing. Photo: Curt Suplee and Emily Edwards, Joint Quan­tum Insti­tute and Uni­ver­sity of Mary­land.

Credit: Science.

Abstract:
New tech­nolo­gies that exploit quan­tum behav­ior for com­put­ing and other appli­ca­tions are closer than ever to being real­ized due to recent advances, accord­ing to a review arti­cle pub­lished this week in the jour­nal Sci­ence.

Quantum computing moves forward

Princeton, NJ | Posted on March 9th, 2013

These advances could enable the cre­ation of immensely pow­er­ful com­put­ers as well as other appli­ca­tions, such as highly sen­si­tive detec­tors capa­ble of prob­ing bio­log­i­cal sys­tems. "We are really excited about the pos­si­bil­i­ties of new semi­con­duc­tor mate­ri­als and new exper­i­men­tal sys­tems that have become avail­able in the last decade," said Jason Petta, one of the authors of the report and an asso­ciate pro­fes­sor of physics at Prince­ton University.

Petta co-authored the arti­cle with David Awschalom of the Uni­ver­sity of Chicago, Lee Bas­set of the Uni­ver­sity of California-Santa Bar­bara, Andrew Dzu­rak of the Uni­ver­sity of New South Wales and Eve­lyn Hu of Har­vard University.

Two sig­nif­i­cant break­throughs are enabling this for­ward progress, Petta said in an inter­view. The first is the abil­ity to con­trol quan­tum units of infor­ma­tion, known as quan­tum bits, at room tem­per­a­ture. Until recently, tem­per­a­tures near absolute zero were required, but new diamond-based mate­ri­als allow spin qubits to be oper­ated on a table top, at room tem­per­a­ture. Diamond-based sen­sors could be used to image sin­gle mol­e­cules, as demon­strated ear­lier this year by Awschalom and researchers at Stan­ford Uni­ver­sity and IBM Research (Sci­ence, 2013).

The sec­ond big devel­op­ment is the abil­ity to con­trol these quan­tum bits, or qubits, for sev­eral sec­onds before they lapse into clas­si­cal behav­ior, a feat achieved by Dzurak's team (Nature, 2010) as well as Prince­ton researchers led by Stephen Lyon, pro­fes­sor of elec­tri­cal engi­neer­ing (Nature Mate­ri­als, 2012). The devel­op­ment of highly pure forms of sil­i­con, the same mate­r­ial used in today's clas­si­cal com­put­ers, has enabled researchers to con­trol a quan­tum mechan­i­cal prop­erty known as "spin". At Prince­ton, Lyon and his team demon­strated the con­trol of spin in bil­lions of elec­trons, a state known as coher­ence, for sev­eral sec­onds by using highly pure silicon-28.

Quantum-based tech­nolo­gies exploit the phys­i­cal rules that gov­ern very small par­ti­cles — such as atoms and elec­trons — rather than the clas­si­cal physics evi­dent in every­day life. New tech­nolo­gies based on "spin­tron­ics" rather than elec­tron charge, as is cur­rently used, would be much more pow­er­ful than cur­rent technologies.

In quantum-based sys­tems, the direc­tion of the spin (either up or down) serves as the basic unit of infor­ma­tion, which is anal­o­gous to the 0 or 1 bit in a clas­si­cal com­put­ing sys­tem. Unlike our clas­si­cal world, an elec­tron spin can assume both a 0 and 1 at the same time, a feat called entan­gle­ment, which greatly enhances the abil­ity to do computations.

A remain­ing chal­lenge is to find ways to trans­mit quan­tum infor­ma­tion over long dis­tances. Petta is explor­ing how to do this with col­lab­o­ra­tor Andrew Houck, asso­ciate pro­fes­sor of elec­tri­cal engi­neer­ing at Prince­ton. Last fall in the jour­nal Nature, the team pub­lished a study demon­strat­ing the cou­pling of a spin qubit to a par­ti­cle of light, known as a pho­ton, which acts as a shut­tle for the quan­tum information.

Yet another remain­ing hur­dle is to scale up the num­ber of qubits from a hand­ful to hun­dreds, accord­ing to the researchers. Sin­gle quan­tum bits have been made using a vari­ety of mate­ri­als, includ­ing elec­tronic and nuclear spins, as well as superconductors.

Some of the most excit­ing appli­ca­tions are in new sens­ing and imag­ing tech­nolo­gies rather than in com­put­ing, said Petta. "Most peo­ple agree that build­ing a real quan­tum com­puter that can fac­tor large num­bers is still a long ways out," he said. "How­ever, there has been a change in the way we think about quan­tum mechan­ics - now we are think­ing about quantum-enabled tech­nolo­gies, such as using a spin qubit as a sen­si­tive mag­netic field detec­tor to probe bio­log­i­cal systems."

The research at Prince­ton Uni­ver­sity was sup­ported by the Alfred P. Sloan Foun­da­tion, the David and Lucile Packard Foun­da­tion, US Army Research Office grant W911NF-08-1-0189, DARPA QuEST award HR0011-09-1-0007 and the US National Sci­ence Foun­da­tion through the Prince­ton Cen­ter for Com­plex Mate­ri­als (DMR-0819860) and CAREER award DMR-0846341

####

For more information, please click here

Contacts:
Catherine Zandonella

Copyright © Princeton University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Read the abstract.

Related News Press

News and information

Atom-thick CCD could capture images: Rice University scientists develop two-dimensional, light-sensitive material December 20th, 2014

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Instant-start computers possible with new breakthrough December 19th, 2014

Aculon Hires New Business Development Director December 19th, 2014

Govt.-Legislation/Regulation/Funding/Policy

Atom-thick CCD could capture images: Rice University scientists develop two-dimensional, light-sensitive material December 20th, 2014

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Switching to spintronics: Berkeley Lab reports on electric field switching of ferromagnetism at room temp December 17th, 2014

ORNL microscopy pencils patterns in polymers at the nanoscale December 17th, 2014

Chip Technology

Instant-start computers possible with new breakthrough December 19th, 2014

Switching to spintronics: Berkeley Lab reports on electric field switching of ferromagnetism at room temp December 17th, 2014

Pb islands in a sea of graphene magnetise the material of the future December 16th, 2014

Stanford team combines logic, memory to build a 'high-rise' chip: Today circuit cards are laid out like single-story towns; Futuristic architecture builds layers of logic and memory into skyscraper chips that would be smaller, faster, cheaper -- and taller December 15th, 2014

Quantum Computing

Nanoscale resistors for quantum devices: The electrical characteristics of new thin-film chromium oxide resistors that can be tuned by controlling the oxygen content detailed in the 'Journal of Applied Physics' December 9th, 2014

Electron pairs on demand: Controlled emission and spatial splitting of electron pairs demonstrated December 4th, 2014

Graphene layer reads optical information from nanodiamonds electronically: Possible read head for quantum computers December 1st, 2014

University of Minnesota engineers make sound loud enough to bend light on a computer chip: Device could improve wireless communications systems November 28th, 2014

Sensors

Promising new method for rapidly screening cancer drugs: UMass Amherst researchers invent fast, accurate new nanoparticle-based sensor system December 15th, 2014

Graphene Applied in Production of Recyclable Electrodes December 13th, 2014

Detecting gases wirelessly and cheaply: New sensor can transmit information on hazardous chemicals or food spoilage to a smartphone December 8th, 2014

Nanosensor to Detect Naproxen Drug Produced in Iran December 6th, 2014

Discoveries

Atom-thick CCD could capture images: Rice University scientists develop two-dimensional, light-sensitive material December 20th, 2014

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Instant-start computers possible with new breakthrough December 19th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

Announcements

Atom-thick CCD could capture images: Rice University scientists develop two-dimensional, light-sensitive material December 20th, 2014

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Instant-start computers possible with new breakthrough December 19th, 2014

Aculon Hires New Business Development Director December 19th, 2014

Grants/Awards/Scholarships/Gifts/Contests/Honors/Records

SUNY Poly NanoCollege Faculty Member Selected as American Physical Society Fellow: SUNY Poly Associate Professor of Nanoscience Dr. Vincent LaBella Recognized for Significant Technological Innovations that Enable Interactive Learning December 17th, 2014

“Line dancing bacteria win the 2014 Dolomite and Lab on a Chip Video Competition” December 16th, 2014

Lifeboat Foundation gives 2014 Guardian Award to Elon Musk December 16th, 2014

UCLA engineers first to detect and measure individual DNA molecules using smartphone microscope December 15th, 2014

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE